The driver was professional and friendly. He arrived in time in our hotel in Tbilisi and brought us to our destination in Yerevan. We had an interesting conversation with him on the way. As we speak Russian, there was no language barrier.
We would have liked communication with the driver to have been more fluid in the two days prior to the trip. Apparently, he didn't speak English well and it was difficult for him to understand our questions and respond quickly via WhatsApp.